Global analysis of solar neutrino and KamLAND data
Global analysis of solar neutrino and KamLAND data
复制标题
太阳中微子和 KamLAND 数据的全球分析
DOI：
10.1088/0954-3899/29/4/305
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
H. Y ksel
中科院分区：
文献类型：
--
作者：
A. Balantekin;H. Y ksel
结合最近的 KamLAND 数据，对所有太阳中微子实验的数据进行了全球分析。文献中经常使用的公式根据适当修改的两种类型的生存概率给出了三种活跃太阳中微子类型的生存概率。计算该公式的修正值，该修正值取决于 θ13 和 δm231。对于大气中微子实验提出的质量尺度，δm231 对这些校正的贡献可以忽略不计。阐述了 θ13 在太阳中微子物理学中的作用。对于电子中微子振荡到另一种活性味道，我们找到了 tan2 θ12 ~ 0.46、tan2 θ13 ~ 0 和 δm221 ~ 7.1 × 10−5 eV2 的最佳拟合值。结果发现，太阳中微子和 KamLAND 数据的组合提供了在 90% 置信水平下的极限 cos4 θ13 > 0.8。
A global analysis of the data from all the solar neutrino experiments combined with the recent KamLAND data is presented. A formula frequently used in the literature gives survival probability for three active solar neutrino flavours in terms of a suitably modified two-flavour survival probability. Corrections to this formula, which depend on θ13 and δm231, are calculated. For the mass scale suggested by the atmospheric neutrino experiments the contributions of δm231 to these corrections are found to be negligible. The role of θ13 in solar neutrino physics is elaborated. For electron neutrino oscillations into another active flavour, we find best fit values of tan2 θ12 ~ 0.46, tan2 θ13 ~ 0 and δm221 ~ 7.1 × 10−5 eV2. It is found that the combined solar neutrino and KamLAND data provide the limit cos4 θ13 > 0.8 at the 90% confidence level.